Questions & Answers

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EE 502 – HOMEWORK # 6 – STUDY QUESTIONS

Questions from Chapters 12-14 of Textbook A by Cook & Polgar

12.8) List four types of standing systems and give advantages and disadvantages of each. What are the

major benefits of these systems.

12.9) Describe the major considerations in choosing manual wheelchair tires, wheels, and casters. List

the major options available for each.

12.14) What types of control interface are typically used for powered wheelchairs?

13.7) What OFF-THE-ROAD components are recommended for inclusion in a driver evaluation?

13.8) What ON-THE-ROAD components are recommended for inclusion in a driver evaluation?

13.9) What are the advantages and disadvantages of the using driving simulators for driving evaluation

and retraining?

13.10) Describe the major considerations for selecting a vehicle for use by an individual with a disability,

as either a driver or passenger. (The following information comes from p. 453-455 of the textbook

and applicable pages of the Course Reader)

Questions from Chapter 14 of Textbook by Cook & Polgarl

14.3) What are the primary types of self-care adaptations provided by low tech manipulations aids?

14.19) Compare the APLRAWT and the DvVAR desktop robot systems in terms of goals, basic design

approach, robot arm used, control interface selected, cost, and degree of technological sophistication.

Questions from the Classroom Lectures on Upper Limb Prostheses

1) What is the major difference between direct and indirect control of a prosthesis?

2) Compare the three basic approaches in myoelectric signal processing.

Course Reader Questions from the Chapter on “Rehabilitation Engineering and Assistive Technology”

5-13) What would the second scale reading (S2) be if the person in Example Problem 5.3 raised both of his legs

straight up and D was known to be 14 in.?

Assume logically that both legs weigh the same so that W = 2 x 20.6 lbs. Given that S1 = 58 lbs., L = 72 inches, and D = 14

inches. Insert this information into the governing equation: WD = L (S1 - S2) to obtain S2 = 50 lbs.

5.15) How much contraction force must the flexor muscles generate in order for a person to hold a 25-

lb weight in his hand, 14 in. from the elbow joint? Assume that the flexor muscle inserts at 90o to

the forearm 2 inches from the elbow joint and that his forearm weighs 4.4 lbs. Use the

equilibrium equation, FX = Fy = M = 0, and Fig. 5.10 to aid your analysis.